Prepaid Expenses (Tables)

12 Months Ended

Dec. 31, 2015

Prepaid Expenses

Schedule of prepaid expenses by component and classification

	December 31
	2015		2014
Prepaid clinical trial expense	$	2,803	$	1,678
Prepaid insurance		780		762
Other		107		42
Total prepaid expenses	$	3,690	$	2,482
Prepaid expenses, short-term	$	3,690	$	804
Prepaid expenses, long-term		—		1,678
Total prepaid expenses	$	3,690	$	2,482